Producing superhard coatings by decomposition of complex salts in shaped-charge explosion

Abstract

The behavior of two new complex salts containing cobalt and tungsten atoms was studied under different thermal conditions. It was found that when heated in air, the salt [Co(NH₃)₆](WO₄)NO₃ exploded at 260°C, and further heating to 800°C led to the formation of a mixture of oxide phases. Heating of [CoEn₃]₂(W ₇O₂₄) · nH₂O was not accompanied by explosion and also led to the formation of cobalt and tungsten oxides. The complex salts were used to produce superhard (Vickers microhardness up to 35.8 GPa) coatings on titanium disks by means of shaped-charge explosion. High microhardness is associated with the formation of carbonitride crystalline phases on the target surfaces.

Original language	English
Pages (from-to)	238-243
Number of pages	6
Journal	Combustion, Explosion and Shock Waves
Volume	49
Issue number	3
DOIs	https://doi.org/10.1134/S0010508213020160
Publication status	Published - Mar 2013
Externally published	Yes

Keywords

coating
cobalt
complex salt
explosion
microhardness
shaped-charge synthesis
tungsten
x-ray analysis

ASJC Scopus subject areas

Physics and Astronomy(all)
Chemical Engineering(all)
Chemistry(all)
Energy Engineering and Power Technology
Fuel Technology

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10.1134/S0010508213020160

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@article{b48efc565bff4264bd7e0f49101f8f57,

title = "Producing superhard coatings by decomposition of complex salts in shaped-charge explosion",

abstract = "The behavior of two new complex salts containing cobalt and tungsten atoms was studied under different thermal conditions. It was found that when heated in air, the salt [Co(NH3)6](WO4)NO3 exploded at 260°C, and further heating to 800°C led to the formation of a mixture of oxide phases. Heating of [CoEn3]2(W 7O24) · nH2O was not accompanied by explosion and also led to the formation of cobalt and tungsten oxides. The complex salts were used to produce superhard (Vickers microhardness up to 35.8 GPa) coatings on titanium disks by means of shaped-charge explosion. High microhardness is associated with the formation of carbonitride crystalline phases on the target surfaces.",

keywords = "coating, cobalt, complex salt, explosion, microhardness, shaped-charge synthesis, tungsten, x-ray analysis",

author = "Gromilov, {S. A.} and Khranenko, {S. P.} and Semitut, {E. Yu} and Kireenko, {I. B.} and Kinelovskii, {S. A.}",

year = "2013",

month = mar,

doi = "10.1134/S0010508213020160",

language = "English",

volume = "49",

pages = "238--243",

journal = "Combustion, Explosion and Shock Waves",

issn = "0010-5082",

publisher = "Springer New York",

number = "3",

}

TY - JOUR

T1 - Producing superhard coatings by decomposition of complex salts in shaped-charge explosion

AU - Gromilov, S. A.

AU - Khranenko, S. P.

AU - Semitut, E. Yu

AU - Kireenko, I. B.

AU - Kinelovskii, S. A.

PY - 2013/3

Y1 - 2013/3

N2 - The behavior of two new complex salts containing cobalt and tungsten atoms was studied under different thermal conditions. It was found that when heated in air, the salt [Co(NH3)6](WO4)NO3 exploded at 260°C, and further heating to 800°C led to the formation of a mixture of oxide phases. Heating of [CoEn3]2(W 7O24) · nH2O was not accompanied by explosion and also led to the formation of cobalt and tungsten oxides. The complex salts were used to produce superhard (Vickers microhardness up to 35.8 GPa) coatings on titanium disks by means of shaped-charge explosion. High microhardness is associated with the formation of carbonitride crystalline phases on the target surfaces.

AB - The behavior of two new complex salts containing cobalt and tungsten atoms was studied under different thermal conditions. It was found that when heated in air, the salt [Co(NH3)6](WO4)NO3 exploded at 260°C, and further heating to 800°C led to the formation of a mixture of oxide phases. Heating of [CoEn3]2(W 7O24) · nH2O was not accompanied by explosion and also led to the formation of cobalt and tungsten oxides. The complex salts were used to produce superhard (Vickers microhardness up to 35.8 GPa) coatings on titanium disks by means of shaped-charge explosion. High microhardness is associated with the formation of carbonitride crystalline phases on the target surfaces.

KW - coating

KW - cobalt

KW - complex salt

KW - explosion

KW - microhardness

KW - shaped-charge synthesis

KW - tungsten

KW - x-ray analysis

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U2 - 10.1134/S0010508213020160

DO - 10.1134/S0010508213020160

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VL - 49

SP - 238

EP - 243

JO - Combustion, Explosion and Shock Waves

JF - Combustion, Explosion and Shock Waves

SN - 0010-5082

IS - 3

ER -